Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9808
Title: Wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber and multimode fiber Bragg grating
Authors: Fang, X
Wai, PKA 
Lu, C 
Feng, X
Keywords: Actively mode-locked fiber laser
Four wave mixing
Highly nonlinear photonic crystal fiber
Multimode fiber Bragg grating
Wavelength switchable multiwavelength pulses
Issue Date: 2008
Publisher: SPIE-International Society for Optical Engineering
Source: Optical engineering, 2008, v. 47, no. 12, 124202 How to cite?
Journal: Optical engineering 
Abstract: A wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber (PCF) and polarization-dependent mode coupling to multimode-fiber Bragg grating (MMFBG) is proposed. Twenty meters of highly nonlinear dispersion-shifted PCF (DS-PCF) is inserted into the fiber ring cavity to suppress gain competition through the four-wave-mixing (FWM) effect. A mode scrambler is attached to the multimode fiber (MMF) to introduce a polarization-dependent mode coupling to the MMFBG. Through changing polarization in the cavity, stable and switchable one-wavelength, two-wavelength (wavelength spacing of 0.8 and 2.4nm), and three-wavelength simultaneously actively mode-locked optical pulse trains at a repetition rate of 5GHz are obtained. We show that high nonlinearity introduced by the nonlinear PCF in the cavity can improve significantly supermode suppression ratio (SMSR) of the multiwavelength pulses generated and a sidemode suppression ratio (SMSR) of 58dB is realized.
URI: http://hdl.handle.net/10397/9808
ISSN: 0091-3286
EISSN: 1560-2303
DOI: 10.1117/1.3041768
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